An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Treatment as a State Actions on Tribal Lands in EPA's South Central Region

Treatment as a State Under the Clean Air Act

Pursuant to Section 301(d) of the Clean Air Act (Act), the U.S. Environmental Protection Agency makes determinations of eligibility for the tribe to receive 'Treatment as a State' (TAS) in the implementation of certain elements of the Clean Air Act.  When a Tribe desires to receive TAS for specific elements of the Clean Air Act, they must make application, EPA must review, the public may comment, and ultimately the EPA may grant the request made by the Tribe.  This page lists the TAS CAA actions and associated documents  for Tribes requesting or that have requested such designation in Region 6.

One may search for all TAS actions that are open for public comment, including those in EPA Region 6 at the website: Public Notice at U.S. EPA

 All documents related to a specific request may be accessed by clicking one of the hypertext links associated with the applicant's name in the table below.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Tribal Nation State CAA Sections for which TAS is Sought TAS Submittal Date TAS Application Deemed Complete Date TAS Application Public Comment Period Begin Date EPA Decision Date
TAS Current Status
Pueblo of Laguna New Mexico 107(d)(3); and 126(a)&(b)

March 19, 2019

March 26, 2019

July 1 2019

Pueblo of Santa Ana New Mexico 107(D)(3); 126; and 505(a)(2) November 16, 2018      
Pueblo of Laguna New Mexico 105; and 505(a)(2)       November 1, 2011